Special tile for drip ledge



April s, 1930.

T; G. czocaHLANv 1,753,332

SPECIAL TILE FOR DRIP LEDGE Filed Jan. 2'7, 1927 INVENTOR ATTORNEY Patented Apr. 8, 193) THOMAS G. COGHLAN, OF ELIZABETH, NEW JERSEY SPECIAL TILE FOR DRIP LEDG-E Application filed January 27, 1927. Serial No, 163,907'.

My present invention relates to the prevention of the accumulation of masses of slag in furnaces, and will be bestfunderstood from the following description and the annexed drawings of an illustrative embodiment thereof.

In the drawings, Fig. 1 is a vertical longitudinal section through the lower part of a Stoker-fired furnace chamber with an illustrative form of slag diverting or eliminating means in elevation; Fig. 2 is a cross-section on line 242 of Fig. 1, and Fig. 8 is an enlarged fragment of Fig. 2.

Like reference characters indicate like parts in the drawings.

In the illustrative embodiment, a furnace chamber 10 has side Walls 11 and front and rear walls 12 and 13, respectively. A chain grate Stoker 14 carriers the fuel bed rand is fed from the front of the furnace and discharges the ash at the rear, all in the usuall manner.

Each side wall 11, as illustrated, is provided with a ledge of sla-g-dellecting tile 16 extending over the grate and spaced thereabove a sufficient distance to direct a flow of slag from the side wall onto the fuel bed on the chain gate stoker 14, so that the fluid.

vitreous material is carried out of the furnace with the ash and therefore is prevented from forming a solid mass within the furnace.

The tile 16 forms a ledge extending into the furnace chamber. In the .illustrative form, the ledge is made up of short sections or lengths'of tile of a material having a higher resistance to slag erosion and a higher refractoriness or fusion-point than the remainder of the wall, because the outwardly extending portion 17 may be subjected to higher tem.- perature than the remainder of the wall. The outwardly extending portion 17 has a downwardly-sloping upper face 18 and a downwardly-sloping 'lower face 19, connected by a rounded nose portion. By making the lower face 19 as shown, the possibility of the viscous slag adhering to the lower face and being carried back to the wall below the ledge is avoided. Y

It will be understood that the arrangements which I have shown are merely illustrative and that the embodiments of my invention may be widely varied. IVhile I have illustrated my invention in connection with a chain grate stoker, it will be understood that it may be used with otherpforms of stokers and that `many of the benefits of my invention may be obtained when it is used with any arrangements by which the drops of slag falling from the ledge are cooled either before or at the time they fall on a recipient surface. By arranging the ledge a suicient distance above the grate` and above the bed of fuel thereon, the slag is caused to drip from the ledge Vand t ierefore reaches the fuel bed in the form of drops or particles of slag, which are easily disposed of with the ash forming on the bed.

I claim:

1. In a furnace, a stoker adapted to support a bed of fuel thereon and extending adjacent a wall of the furnace, and a ledge extending, from the wall over said bed of fuel and spaced a substantial distance thereabove, the lower face of said ledge sloping downwardly away from the wall, whereby slag running down thel wall will fall from said ledge on to said 2. In a furnace, a Stoker-adapted to support a bed of fuel thereon and extending adjacent a wall of the furnace, and a ledge extending from the wall over said bed of fuel and spaced y asubstantial distance thereabove, theupper and lower. facesof said ledge sloping downwardly away from the wall, whereby vslag running down the wall will fall from said ledge on to said bed. v 3. In a furnace, a. Stoker adapted to support a bed of fuel thereon and extending adjacent a wall of the furnace, and a ledge eX- tending from the wall over said bed o'f fuel and spaced a substantial distance thereabove, the upper and lower faces of said ledge sloping downwardly away from the wall and connected by a rounded nose portion, whereb slag running down the wall will fall from said ledge on to said bed.

THOMAS e. coGHLAN. 

